<!DOCTYPE html>
<html>
<head>
<title>Spiral Layout</title>
<!-- Copyright 1998-2016 by Northwoods Software Corporation. -->
<meta charset="UTF-8">
<script src="go.js"></script>
<link href="../assets/css/goSamples.css" rel="stylesheet" type="text/css" />  <!-- you don't need to use this -->
<script src="goSamples.js"></script>  <!-- this is only for the GoJS Samples framework -->
<script src="SpiralLayout.js"></script>

<script id="code">
  function init() {
    if (window.goSamples) goSamples();  // init for these samples -- you don't need to call this
    var $ = go.GraphObject.make;

    myDiagram =
      $(go.Diagram, "myDiagramDiv",  // create a Diagram for the DIV HTML element
        {
          initialContentAlignment: go.Spot.Center,
          initialAutoScale: go.Diagram.Uniform,
          isTreePathToChildren: false,  // links go from child to parent
          layout: $(SpiralLayout)  // defined in SpiralLayout.js
        });

    myDiagram.nodeTemplate =
      $(go.Node, go.Panel.Auto,
        { locationSpot: go.Spot.Center },
        $(go.Shape, { figure: "Circle", fill: "white" },
          new go.Binding("fill", "color")),
        $(go.TextBlock, { margin: 4 },
          new go.Binding("text", "key")));

    myDiagram.linkTemplate =
      $(go.Link,
        { curve: go.Link.Bezier, curviness: 10 },
        $(go.Shape),
        $(go.Shape, { toArrow: "Standard" }));

    var model = new go.TreeModel();
    model.nodeParentKeyProperty = "next";
    model.nodeDataArray = [
      { key: "Alpha", next: "Beta", color: "coral" },
      { key: "Beta", next: "Gamma", color: "tomato" },
      { key: "Gamma", next: "Delta", color: "goldenrod" },
      { key: "Delta", next: "Epsilon", color: "orange" },
      { key: "Epsilon", next: "Zeta", color: "coral" },
      { key: "Zeta", next: "Eta", color: "tomato" },
      { key: "Eta", next: "Theta", color: "goldenrod" },
      { key: "Theta", next: "Iota", color: "orange" },
      { key: "Iota", next: "Kappa", color: "coral" },
      { key: "Kappa", next: "Lambda", color: "tomato" },
      { key: "Lambda", next: "Mu", color: "goldenrod" },
      { key: "Mu", next: "Nu", color: "orange" },
      { key: "Nu", next: "Xi", color: "coral" },
      { key: "Xi", next: "Omicron", color: "tomato" },
      { key: "Omicron", next: "Pi", color: "goldenrod" },
      { key: "Pi", next: "Rho", color: "orange" },
      { key: "Rho", next: "Sigma", color: "coral" },
      { key: "Sigma", next: "Tau", color: "tomato" },
      { key: "Tau", next: "Upsilon", color: "goldenrod" },
      { key: "Upsilon", next: "Phi", color: "orange" },
      { key: "Phi", next: "Chi", color: "coral" },
      { key: "Chi", next: "Psi", color: "tomato" },
      { key: "Psi", next: "Omega", color: "goldenrod" },
      { key: "Omega", next: "Alpha2", color: "orange" },
      { key: "Alpha2", next: "Beta2", color: "coral" },
      { key: "Beta2", next: "Gamma2", color: "tomato" },
      { key: "Gamma2", next: "Delta2", color: "goldenrod" },
      { key: "Delta2", next: "Epsilon2", color: "orange" },
      { key: "Epsilon2", next: "Zeta2", color: "coral" },
      { key: "Zeta2", next: "Eta2", color: "tomato" },
      { key: "Eta2", next: "Theta2", color: "goldenrod" },
      { key: "Theta2", next: "Iota2", color: "orange" },
      { key: "Iota2", next: "Kappa2", color: "coral" },
      { key: "Kappa2", next: "Lambda2", color: "tomato" },
      { key: "Lambda2", next: "Mu2", color: "goldenrod" },
      { key: "Mu2", next: "Nu2", color: "orange" },
      { key: "Nu2", next: "Xi2", color: "coral" },
      { key: "Xi2", next: "Omicron2", color: "tomato" },
      { key: "Omicron2", next: "Pi2", color: "goldenrod" },
      { key: "Pi2", next: "Rho2", color: "orange" },
      { key: "Rho2", next: "Sigma2", color: "coral" },
      { key: "Sigma2", next: "Tau2", color: "tomato" },
      { key: "Tau2", next: "Upsilon2", color: "goldenrod" },
      { key: "Upsilon2", next: "Phi2", color: "orange" },
      { key: "Phi2", next: "Chi2", color: "coral" },
      { key: "Chi2", next: "Psi2", color: "tomato" },
      { key: "Psi2", next: "Omega2", color: "goldenrod" },
      { key: "Omega2", color: "orange" }    ];
    myDiagram.model = model;
  }
</script>
</head>
<body onload="init()">
<div id="sample">
  <div id="myDiagramDiv" style="border: solid 1px blue; width:100%; height:700px; min-width: 200px"></div>
  <p>
  This sample demonstrates a custom Layout, SpiralLayout, which assumes the graph consists of a chain of nodes.
  The layout is defined in its own file, as <a href="SpiralLayout.js">SpiralLayout.js</a>.
  </p>
</div>
</body>
</html>
